Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cau theo » cau thi, cau tao
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va danh, ban hanh
hai cau » hai chau, hai chu, hai hau
y nang » ly nang, v nang, may nang
ho hoi » hoc hoi, hoa hoi, hoi hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((y nang) OR (ky nang)) ho hoi. hieu va cac xuc ((va hanh) or (va thanh)) hai cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((y nang) OR (ky nang)) ho hoi. hieu va cac xuc ((va hanh) OR (va thanh)) hai cau theo.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((y nang) OR (ky nang)) ho hoi. hieu va cac xuc ((va hanh) or (va thanh)) hai cau theo".
• Adding a wildcard symbol may retrieve word variants: su sach ((y nang) OR (ky nang)) ho hoi. hieu va cac xuc ((va hanh) or (va thanh)) hai cau theo*.